Wrap the 'o' Ring in tissue and pull the 'o' Ring through the tissue. This wipes the 'o' Ring clean as it passes through the tissue.

一边用纸巾擦o型圈，一边拉o型圈。这可以让O型圈通过纸巾的时候被擦干净。

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First check assembly O-ring, Disc holder assembly, Cover O-ring and Sensing passage O-ring.

第一止回阀总成O形环，阀瓣固定器总成，阀盖O形环和感应通道O形环。

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In this paper, a new Tip-up segmental die of rubber O-Ring is designed to solve those problems above, and it has been carried out as internal O-Ring design standard in our research institute.

本文所述橡胶O形圈翻页式组合模具是为解决上述问题而设计和改进，并作为本单位内部O形圈模具设计标准执行。

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Way back in November of 1985, on just its second mission, Atlantis experienced a blow-back of hot gases past the primary O-rings in one of its solid rocket boosters, resulting in serious erosion of said O-ring.

ENGADGET: Space Shuttle Atlantis ends its run of predicting disaster for other NASA shuttles

Some of those Thiokol engineers expected o-ring failures at liftoff.

NPR: Challenger: Reporting a Disaster's Cold, Hard Facts

In the case of the Challenger, the culprit was a simple O-ring that had become too brittle to do its job after a freezing night waiting on the launch pad.

FORBES: BP Oil Spill Investigation Will Focus On Blowout Preventers